Osmunda claytoniana


Sp. Pl. 2: 1066. 1753

Common names: Interrupted fern osmonde de clayton
Treatment appears in FNA Volume 2.
Click plate for higher resolution version.
Illustrator: John Myers
Leaves pinnate-pinnatifid; petioles ca. 1/3 length of blades, winged, with light brown hairs, becoming glabrate. Sterile leaves elliptic to oblong, ca. 0.5–1 m; pinnae broadly oblong, lacking persistent tuft of hairs at base; ultimate segments with base truncate, margins entire, apex rounded. Fertile leaves with greatly reduced, sporangia-bearing medial pinnae that wither early, giving appearance of no middle pinnae (hence the vernacular name, interrupted fern). Sporangia greenish, turning dark brown. 2n =44.

Phenology: Sporulation early spring–midsummer.
Habitat: 0–2300 m


V2 776-distribution-map.gif

St. Pierre and Miquelon, Man., N.B., Nfld., N.S., Ont., P.E.I., Que., Conn., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis., Asia


Osmunda claytoniana is sparingly cultivated as an ornamental.



Lower Taxa

No lower taxa listed.

Facts about "Osmunda claytoniana"
AuthorR. David Whetstone + and T. A. Atkinson +
AuthorityLinnaeus +
Common nameInterrupted fern + and osmonde de clayton +
DistributionSt. Pierre and Miquelon +, Man. +, N.B. +, Nfld. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Tenn. +, Vt. +, Va. +, W.Va. +, Wis. + and Asia +
Habitat0–2300 m +
IllustratorJohn Myers +
PhenologySporulation early spring–midsummer. +
Publication titleSp. Pl. +
Publication year1753 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V2/V2 776.xml +
Taxon familyOsmundaceae +
Taxon nameOsmunda claytoniana +
Taxon parentOsmunda +
Taxon rankspecies +
VolumeVolume 2 +